Coin freed device for dispensing liquids



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Z. WEESELTHER COIN FREED DEVICE FOR DISPENSING LIQUIDS 2 Sheets-Sheet 1 Filed July 2, 1946 WW fiwyww may 3@, Wfifi z. WIESELTIER com FREED DEVICE FOR DISPENSING LIQUIDS 2 Sheets -Sheet 2 Filed July 2, 1946 [n U 9 T1 Z0 7 Zeev Wieseltier All orrzey Patented May 30, 1950 UNITED STATES PATENT OFFICE COIN FREED DEVICE FOR DISPENSING LIQUIDS 4 Claims.

The invention relates to a coin freed liquid dispensing device as may be advantageously used for easy provision of the public with petrol for cigarette lighters, with perfume, eau de Cologne, milk, juice or the like. The device comprises a liquid tank arranged within a casing and a vertical reciprocating pump located within the tank. The cylinder of the pump projects down through the bottom of the tank and is provided just above this bottom with openings for communication with the tank and below that bottom with a screwed on cap provided with an outflow duct normally closed by a spring pressed ball valve. The piston of the pump is connected by a pivoted knee-lever to a horizontally slidable bolt. A spring slid on the bolt tends to urge the latter outwardly until it projects with one end out of the casing through a hole provided therein and thereby to raise the piston, but normally the bolt is held by locking means in retracted position within the casing thus keeping the piston in its lowermost position. These locking means are adapted to be released by the introduction of a coin into the coin-slot of the device, thus allowing the bolt to move out of the casing and the piston to rise and to suck liquid through said openings from the tank into the cylinder, while on pushing back the bolt by hand into the casing until it is again automatically locked, the liquid is forced out from the cylinder through the said ball valve.

A characteristic feature of the invention lies in the fact that the unlocking of the push bolt is not performed directly by the inserted coin, which ofiers the possibility of tampering with the device by means of an inserted wire or the like. According to the invention the coin chute is provided near its entrance with means for retaining the inserted coin. A second push rod is provided for pressing the inserted coin beyond the retaining means, which coin then unlocks the bolt.

Other novel features will be apparent from the following detailed description and the appended drawings.

The invention is illustrated by way of example in the annexed drawings:

Fig. 1 shows a vertical section from the front to the rear of the device; Fig. 2 is a like partial view of the device in a different position; Fig. 3 is a plan view of the uncovered device; Fig. 4. shows a detail as seen in section on line IV-IV of Fig. 3; Fig. 5 represents a section on the line VV of Fig. 3; Fig. 6 is a partial rear view of the device; Figs. 7 and 8 are partial front and side views of the device respectively the outer casing being removed; Figs. 9 and 10 are sections on the lines IX-IX and X- X of Fig. 3.

In a rectangular sheet metal casing composed of a hollow cover part I and a plane rear wall l is enclosed a liquid tank 2 having a filling spout 2 and a coin receptacle 3. The cover part I is hinged to the rear wall I, adapted to be screwed at a convenient point to a wall of a shop or public place and can be opened to allow the removal of the tank 2 and receptacle 3. The latter stands on the bottom of the casing behind the tank 2 which is itself supported above that bottom on ledges 4 soldered to the inside of the lateral walls of the casing. The casing has openings for the coin to be introduced, a push button by means of which a quantity of the liquid is released, and an opening through which this liquid is drained off, as described below in greater detail.

The coin operated and liquid dispensing mechanism forms a unit with the tank 2. Within the tank 2 is arranged a pump comprising a cylinder 5 and a piston 65. The cylinder 5 projects down through the bottom of the tank and is there closed by a screwed cap 5. Cap 5 has a central bore 1, the lower end of which is closed by a pierced screw 5". Within the cap 5 is seated a spring controlled ball valve 8. From cap 5 is branched off a laterally extending outlet pipe 8. Normally valve 8 interrupts the communication between bore 7 and outlet pipe 8. In the cylinder 5 there are provided openings 5] just above the bottom of the tank 2. Within the cylinder moves the piston 6. During its upward movement liquid can enter from the tank into the cylinder underneath the piston through the openings 9. During its downstroke the liquid is pressed out through the valve 8 into pipe 8' wherefrom it fiows into a funnel It provided in the bottom or the casing l and leaves the casing through a small tube It. The distance between holes e and the lowermost position of piston it determines the quantity of liquid dispensed during each downstroke of the piston. ll? designates a sieve and II is a small valve having a slotted head, so as to allow a drop-wise discharge only of the liquid.

Piston 6 is provided with an upwardly extending adjustable rod 12, which engages at its upper end by means of a pin l3 into a slot i i of a knee lever l5 pivoted at It on a post ll fixed on the top of the tank 2. Slot Hi is provided at one end of the knee-lever. The other end of lever 55 engages a cross-pin l8 projecting laterally from a bolt I3 which can slide from the front to the rear in superstructure 59, i9 arranged on the top of the tank 2. A spring 22 slid on the bolt it and abutting at the rear against the wall it of the structure and at the front against a shoulder 20 of the bolt tends to keep the bolt in its foremost position i. e. with its visible front end projecting out of the front Wall of the casing, this projecting end of the bolt l8 representing the push button of the device. In the .outermost position ofithe push buttcn the piston is=in its highest'posit'i on'inthe cylinder see Fig. 1, and in the innermost position or" the button the piston 8 is in its lowermost positio in the cylinders. Spring 22 tends to move the bbltfiiS-intothe outermost and piston 6 into the uppermost position. But bolt 18 is normally held in the rear and the piston in the lowermost position by locking means to be each time released by the ccin into the apparatus. lhese locking means comprise tumbler 23 fixed at the rear end on an' arkleZE andhaving near its front end a circular hole Q'The' push'bolt it passes through this hole that the tumbler323 can engage into the c ferential groove fiki'of the boltgwhen 'th {i "in-its "nnerposition, as-seeninFigQ. A small jsprin g' ill tends to "keep the-locking tumblerin en gage1nentwith the bolt. *Tuinb videdwith' a hocke-dspring'ii's ei ashoulderfii oftheknee lever 'E ping he piston-t in its uppermost position. When push'b'oit i3 ispressed inward and tumbleri engages the gr'oovetfi frombelow, hoot-zed spring 'ET re'lea'Ses'the knee lever This 1 "occur onlyafter'a coin hasbeen properly introduced,

' as seen "from the following desc tion.

laraliel to thebolt it is slio r journalled onthetopof the tankrod' 5 -besideil'ie cQ' hute'ea nodal has at telal pin pro- *jectinginto thechute "Wi thechute "32 there is provided aneleva'tion'tli' adapted "to retain =any coin introduced into the chute. flhe coin' can .be urged over and beyond this elei tion'bythe piniitlof'the pi rodttwhenthe l tter is 'pushed inward. "Rod ti is-n'orrr grheld out of the path' of the coin by a a; ing Into fthis' path-projects also normallyan djustahle through the restriction','whereby lever 2 israised v autumn l--23 lowered andbrought out of enga gementwith groove 5253 of thebolt Means are provided forpreventing theintro- 'dutjtionofcoins, whenever the evice'becoines empty. To this end a shutter for the insert 'openi'ngbff't'he coinchute is so disposed'as'not "*toiobstruct the insert'when in the pcsitioni di- '"cated in full lines'in Fig. '7 and to ciose'thein c t whendn'the position indicated there in dotted lines. The 'shutter is fastened to pivotal'lyjourn'alled on the tone? the tank in par- "'alle'lisni'with rod 59. It is behind the tank bent rectangularly into the prolongation apart ttFis set ofi anolcan rest on a step of asacldle sislidingly arranged on screw tl reat "zontal spindle 3t, rotatably ourna" "l tank 2.' On the spindle is sorev d cthed .whee135 into which enga aste'n'ed 'to push'bo'lt l8; Eaclitime the push bolt moved -tdandfro, spindle 3t is turned through a certain angle. Saddle 31 carries a removable pin 38 engaging into the screw thread of spindle 3 3, so that the saddle 3'5 moves along the turning spindle 34. Saddle 31 is prevented from turning by a stationary rod 59 which is parallel to the spindle and is passed through a cut out 5%! of the saddle. When the saddle reaches the set off between the rod parts 56' and 55" the latter ceases to be supported by the saddle and down bringing "thereby the shutter iritofthe position indicated by the dotted lines. An abutment ti adjustably The just described parts are so the screw-thread of spindle 34.

"A spring Attends to pull rod 55" down and to close the shutter. p

The apparatus operates as" follows: 'In position'of rest,see Fig. 2 bolt lt-is-almost wholly located Within the apparatus and'is held therein by the tumbler 23' engaging into the groove "260i the bolt from-"below. A'coin 5541s inserted-in chute fiiwh'ere "it' is at first retained by an elevated part'32"-'of the'fchutebehind the pin '52 of the push- Teddi.

latter rod; tl1ecointle3 is urged over that elevation By "pushing "in oi the '32, at the'same time lifting lever arm flit-and pressing arm or tumbler 23 'downbut of engagethus unlocked and pushed byspring '22 out offthe housing of the'apparatus, see Fig." l. Theoutwardly moving bolt'it' turns by'h eansoffits and pressing end of its inward movement'the b ltifials arrested "bythe' tumblerz'turged by sprin'g"2"l to engage into groove 26 of the bolt. a I

Each time bolt '!;8 "inoves outwardly, itflturns "by'means of ratch'ettii'th'e toothed-Wheel Shfixed "on the'screw spindle 3rd, 'throu'ghaniore or less small angle. "Thereby "pint-l8 engaging 'intothe screw-thread of "with th'esaddle "indie "3t is moved togetlier saddle, which supports"pe;rt 555"" of lever 5%,

"comes out of contact with that part urhereby owing to-spring ttfl'ever e" turns and brings shutter 39 "fromthe position shown in Fig: Kin full lines into position there indicated by dotted lines, so that no coin can 'anyjrhore' "be "inserted liquid tank, a piston pump'communica-ting with this tank, a push bolt operatively connectedwith the piston of the pump, a spring ;pressing the push bolt outwardly from the device causing the piston to make thesucking strokefa spring away Horny/heel its? untilfthe inserted between the push bolt and the piston and acting as an intermediate means for causing the piston to make the discharge stroke when the bolt is pushed into the device, means for locking the push-bolt in the position of discharge, and coin operated means for releasing the means locking the push bolt.

2. In a coin freed liquid dispensing device, a liquid tank, a piston-pump communicating with this tank, a push bolt, a pin on the push bolt, a spring pressing the push bolt outwardly from the device, an elbow lever one end of which is acted upon by the pin when the bolt is urged outward and the other end of which is attached to the piston of the pump for simultaneously moving the piston through the suction stroke, a spring acted upon by the pin when the bolt is pushed inwards for resiliently moving the elbow lever and piston through the discharge stroke, means for locking the push-bolt in the position of discharge and coin operated means for releasing the means locking the push bolt.

3. In a coin freed liquid dispensing device, a liquid tank, a piston pump arranged inside and communicating with this tank, a push bolt operatively connected with the piston of the pump, a spring pressing the push bolt outwardly from the device and causing the piston to make the sucking stroke, a spring inserted between the push bolt and the piston and acting as an intermediate means for causing the piston to make the discharge when the bolt is pushed into the device, means for locking the push-bolt in the position 6 of discharge, and coin operated means for releasing the means locking the push bolt.

4. In a coin freed liquid dispensing device, a liquid tank, a vertical piston-pump communicating with this tank, a push bolt, a pin on the push bolt, a spring pressing the push bolt outwardly from the device, an elbow lever one end of which is acted upon by the pin when the bolt is urged outwards and the other end of which is attached to the piston of the pump for simultaneously moving the piston through the suction stroke, a spring acted upon by the pin when the bolt is pushed inwards for resiliently moving the elbow lever and piston through the discharge stroke, means for locking the push-bolt in the position of discharge; means for locking the elbow and piston in position at the end of the suction stroke, and coin operated means which alternately lock the bolt and release the elbow and piston and thereafter release the bolt and lock the elbow and piston.

ZEEV WIESELTIER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 471,821 Mayrhofer Mar. 29, 1892 482,824 Dain Sept. 20, 1892 780,560 Ford Jan. 24, 1905 1,226,587 Paul May 15, 1917 

